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1c1e45d1 HV |
1 | /* |
2 | * cx18 I2C functions | |
3 | * | |
4 | * Derived from ivtv-i2c.c | |
5 | * | |
6 | * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
21 | * 02111-1307 USA | |
22 | */ | |
23 | ||
24 | #include "cx18-driver.h" | |
25 | #include "cx18-cards.h" | |
26 | #include "cx18-gpio.h" | |
27 | #include "cx18-av-core.h" | |
50510993 | 28 | #include "cx18-i2c.h" |
1c1e45d1 HV |
29 | |
30 | #include <media/ir-kbd-i2c.h> | |
31 | ||
32 | #define CX18_REG_I2C_1_WR 0xf15000 | |
33 | #define CX18_REG_I2C_1_RD 0xf15008 | |
34 | #define CX18_REG_I2C_2_WR 0xf25100 | |
35 | #define CX18_REG_I2C_2_RD 0xf25108 | |
36 | ||
37 | #define SETSCL_BIT 0x0001 | |
38 | #define SETSDL_BIT 0x0002 | |
39 | #define GETSCL_BIT 0x0004 | |
40 | #define GETSDL_BIT 0x0008 | |
41 | ||
42 | #ifndef I2C_ADAP_CLASS_TV_ANALOG | |
43 | #define I2C_ADAP_CLASS_TV_ANALOG I2C_CLASS_TV_ANALOG | |
44 | #endif | |
45 | ||
46 | #define CX18_CS5345_I2C_ADDR 0x4c | |
47 | ||
48 | /* This array should match the CX18_HW_ defines */ | |
49 | static const u8 hw_driverids[] = { | |
50 | I2C_DRIVERID_TUNER, | |
51 | I2C_DRIVERID_TVEEPROM, | |
52 | I2C_DRIVERID_CS5345, | |
53 | 0, /* CX18_HW_GPIO dummy driver ID */ | |
54 | 0 /* CX18_HW_CX23418 dummy driver ID */ | |
55 | }; | |
56 | ||
57 | /* This array should match the CX18_HW_ defines */ | |
58 | static const u8 hw_addrs[] = { | |
59 | 0, | |
60 | 0, | |
61 | CX18_CS5345_I2C_ADDR, | |
62 | 0, /* CX18_HW_GPIO dummy driver ID */ | |
63 | 0, /* CX18_HW_CX23418 dummy driver ID */ | |
64 | }; | |
65 | ||
66 | /* This array should match the CX18_HW_ defines */ | |
67 | /* This might well become a card-specific array */ | |
68 | static const u8 hw_bus[] = { | |
69 | 0, | |
70 | 0, | |
71 | 0, | |
72 | 0, /* CX18_HW_GPIO dummy driver ID */ | |
73 | 0, /* CX18_HW_CX23418 dummy driver ID */ | |
74 | }; | |
75 | ||
76 | /* This array should match the CX18_HW_ defines */ | |
af294867 | 77 | static const char * const hw_devicenames[] = { |
1c1e45d1 HV |
78 | "tuner", |
79 | "tveeprom", | |
80 | "cs5345", | |
81 | "gpio", | |
82 | "cx23418", | |
83 | }; | |
84 | ||
85 | int cx18_i2c_register(struct cx18 *cx, unsigned idx) | |
86 | { | |
87 | struct i2c_board_info info; | |
88 | struct i2c_client *c; | |
89 | u8 id, bus; | |
90 | int i; | |
91 | ||
92 | CX18_DEBUG_I2C("i2c client register\n"); | |
93 | if (idx >= ARRAY_SIZE(hw_driverids) || hw_driverids[idx] == 0) | |
94 | return -1; | |
95 | id = hw_driverids[idx]; | |
96 | bus = hw_bus[idx]; | |
97 | memset(&info, 0, sizeof(info)); | |
af294867 | 98 | strlcpy(info.type, hw_devicenames[idx], sizeof(info.type)); |
1c1e45d1 HV |
99 | info.addr = hw_addrs[idx]; |
100 | for (i = 0; i < I2C_CLIENTS_MAX; i++) | |
101 | if (cx->i2c_clients[i] == NULL) | |
102 | break; | |
103 | ||
104 | if (i == I2C_CLIENTS_MAX) { | |
105 | CX18_ERR("insufficient room for new I2C client!\n"); | |
106 | return -ENOMEM; | |
107 | } | |
108 | ||
109 | if (id != I2C_DRIVERID_TUNER) { | |
110 | c = i2c_new_device(&cx->i2c_adap[bus], &info); | |
111 | if (c->driver == NULL) | |
112 | i2c_unregister_device(c); | |
113 | else | |
114 | cx->i2c_clients[i] = c; | |
115 | return cx->i2c_clients[i] ? 0 : -ENODEV; | |
116 | } | |
117 | ||
118 | /* special tuner handling */ | |
119 | c = i2c_new_probed_device(&cx->i2c_adap[1], &info, cx->card_i2c->radio); | |
120 | if (c && c->driver == NULL) | |
121 | i2c_unregister_device(c); | |
122 | else if (c) | |
123 | cx->i2c_clients[i++] = c; | |
124 | c = i2c_new_probed_device(&cx->i2c_adap[1], &info, cx->card_i2c->demod); | |
125 | if (c && c->driver == NULL) | |
126 | i2c_unregister_device(c); | |
127 | else if (c) | |
128 | cx->i2c_clients[i++] = c; | |
129 | c = i2c_new_probed_device(&cx->i2c_adap[1], &info, cx->card_i2c->tv); | |
130 | if (c && c->driver == NULL) | |
131 | i2c_unregister_device(c); | |
132 | else if (c) | |
133 | cx->i2c_clients[i++] = c; | |
134 | return 0; | |
135 | } | |
136 | ||
137 | static int attach_inform(struct i2c_client *client) | |
138 | { | |
139 | return 0; | |
140 | } | |
141 | ||
142 | static int detach_inform(struct i2c_client *client) | |
143 | { | |
144 | int i; | |
145 | struct cx18 *cx = (struct cx18 *)i2c_get_adapdata(client->adapter); | |
146 | ||
147 | CX18_DEBUG_I2C("i2c client detach\n"); | |
148 | for (i = 0; i < I2C_CLIENTS_MAX; i++) { | |
149 | if (cx->i2c_clients[i] == client) { | |
150 | cx->i2c_clients[i] = NULL; | |
151 | break; | |
152 | } | |
153 | } | |
154 | CX18_DEBUG_I2C("i2c detach [client=%s,%s]\n", | |
155 | client->name, (i < I2C_CLIENTS_MAX) ? "ok" : "failed"); | |
156 | ||
157 | return 0; | |
158 | } | |
159 | ||
160 | static void cx18_setscl(void *data, int state) | |
161 | { | |
162 | struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx; | |
163 | int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index; | |
164 | u32 addr = bus_index ? CX18_REG_I2C_2_WR : CX18_REG_I2C_1_WR; | |
165 | u32 r = read_reg(addr); | |
166 | ||
167 | if (state) | |
168 | write_reg_sync(r | SETSCL_BIT, addr); | |
169 | else | |
170 | write_reg_sync(r & ~SETSCL_BIT, addr); | |
171 | } | |
172 | ||
173 | static void cx18_setsda(void *data, int state) | |
174 | { | |
175 | struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx; | |
176 | int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index; | |
177 | u32 addr = bus_index ? CX18_REG_I2C_2_WR : CX18_REG_I2C_1_WR; | |
178 | u32 r = read_reg(addr); | |
179 | ||
180 | if (state) | |
181 | write_reg_sync(r | SETSDL_BIT, addr); | |
182 | else | |
183 | write_reg_sync(r & ~SETSDL_BIT, addr); | |
184 | } | |
185 | ||
186 | static int cx18_getscl(void *data) | |
187 | { | |
188 | struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx; | |
189 | int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index; | |
190 | u32 addr = bus_index ? CX18_REG_I2C_2_RD : CX18_REG_I2C_1_RD; | |
191 | ||
192 | return read_reg(addr) & GETSCL_BIT; | |
193 | } | |
194 | ||
195 | static int cx18_getsda(void *data) | |
196 | { | |
197 | struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx; | |
198 | int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index; | |
199 | u32 addr = bus_index ? CX18_REG_I2C_2_RD : CX18_REG_I2C_1_RD; | |
200 | ||
201 | return read_reg(addr) & GETSDL_BIT; | |
202 | } | |
203 | ||
204 | /* template for i2c-bit-algo */ | |
205 | static struct i2c_adapter cx18_i2c_adap_template = { | |
206 | .name = "cx18 i2c driver", | |
207 | .id = I2C_HW_B_CX2341X, | |
208 | .algo = NULL, /* set by i2c-algo-bit */ | |
209 | .algo_data = NULL, /* filled from template */ | |
210 | .client_register = attach_inform, | |
211 | .client_unregister = detach_inform, | |
212 | .owner = THIS_MODULE, | |
213 | }; | |
214 | ||
215 | #define CX18_SCL_PERIOD (10) /* usecs. 10 usec is period for a 100 KHz clock */ | |
216 | #define CX18_ALGO_BIT_TIMEOUT (2) /* seconds */ | |
217 | ||
218 | static struct i2c_algo_bit_data cx18_i2c_algo_template = { | |
219 | .setsda = cx18_setsda, | |
220 | .setscl = cx18_setscl, | |
221 | .getsda = cx18_getsda, | |
222 | .getscl = cx18_getscl, | |
223 | .udelay = CX18_SCL_PERIOD/2, /* 1/2 clock period in usec*/ | |
224 | .timeout = CX18_ALGO_BIT_TIMEOUT*HZ /* jiffies */ | |
225 | }; | |
226 | ||
227 | static struct i2c_client cx18_i2c_client_template = { | |
228 | .name = "cx18 internal", | |
229 | }; | |
230 | ||
231 | int cx18_call_i2c_client(struct cx18 *cx, int addr, unsigned cmd, void *arg) | |
232 | { | |
233 | struct i2c_client *client; | |
234 | int retval; | |
235 | int i; | |
236 | ||
237 | CX18_DEBUG_I2C("call_i2c_client addr=%02x\n", addr); | |
238 | for (i = 0; i < I2C_CLIENTS_MAX; i++) { | |
239 | client = cx->i2c_clients[i]; | |
240 | if (client == NULL || client->driver == NULL || | |
241 | client->driver->command == NULL) | |
242 | continue; | |
243 | if (addr == client->addr) { | |
244 | retval = client->driver->command(client, cmd, arg); | |
245 | return retval; | |
246 | } | |
247 | } | |
248 | if (cmd != VIDIOC_G_CHIP_IDENT) | |
249 | CX18_ERR("i2c addr 0x%02x not found for cmd 0x%x!\n", | |
250 | addr, cmd); | |
251 | return -ENODEV; | |
252 | } | |
253 | ||
254 | /* Find the i2c device based on the driver ID and return | |
255 | its i2c address or -ENODEV if no matching device was found. */ | |
256 | static int cx18_i2c_id_addr(struct cx18 *cx, u32 id) | |
257 | { | |
258 | struct i2c_client *client; | |
259 | int retval = -ENODEV; | |
260 | int i; | |
261 | ||
262 | for (i = 0; i < I2C_CLIENTS_MAX; i++) { | |
263 | client = cx->i2c_clients[i]; | |
264 | if (client == NULL || client->driver == NULL) | |
265 | continue; | |
266 | if (id == client->driver->id) { | |
267 | retval = client->addr; | |
268 | break; | |
269 | } | |
270 | } | |
271 | return retval; | |
272 | } | |
273 | ||
274 | /* Find the i2c device name matching the DRIVERID */ | |
275 | static const char *cx18_i2c_id_name(u32 id) | |
276 | { | |
277 | int i; | |
278 | ||
279 | for (i = 0; i < ARRAY_SIZE(hw_driverids); i++) | |
280 | if (hw_driverids[i] == id) | |
af294867 | 281 | return hw_devicenames[i]; |
1c1e45d1 HV |
282 | return "unknown device"; |
283 | } | |
284 | ||
285 | /* Find the i2c device name matching the CX18_HW_ flag */ | |
286 | static const char *cx18_i2c_hw_name(u32 hw) | |
287 | { | |
288 | int i; | |
289 | ||
290 | for (i = 0; i < ARRAY_SIZE(hw_driverids); i++) | |
291 | if (1 << i == hw) | |
af294867 | 292 | return hw_devicenames[i]; |
1c1e45d1 HV |
293 | return "unknown device"; |
294 | } | |
295 | ||
296 | /* Find the i2c device matching the CX18_HW_ flag and return | |
297 | its i2c address or -ENODEV if no matching device was found. */ | |
298 | int cx18_i2c_hw_addr(struct cx18 *cx, u32 hw) | |
299 | { | |
300 | int i; | |
301 | ||
302 | for (i = 0; i < ARRAY_SIZE(hw_driverids); i++) | |
303 | if (1 << i == hw) | |
304 | return cx18_i2c_id_addr(cx, hw_driverids[i]); | |
305 | return -ENODEV; | |
306 | } | |
307 | ||
308 | /* Calls i2c device based on CX18_HW_ flag. If hw == 0, then do nothing. | |
309 | If hw == CX18_HW_GPIO then call the gpio handler. */ | |
310 | int cx18_i2c_hw(struct cx18 *cx, u32 hw, unsigned int cmd, void *arg) | |
311 | { | |
312 | int addr; | |
313 | ||
314 | if (hw == CX18_HW_GPIO || hw == 0) | |
315 | return 0; | |
316 | if (hw == CX18_HW_CX23418) | |
317 | return cx18_av_cmd(cx, cmd, arg); | |
318 | ||
319 | addr = cx18_i2c_hw_addr(cx, hw); | |
320 | if (addr < 0) { | |
321 | CX18_ERR("i2c hardware 0x%08x (%s) not found for cmd 0x%x!\n", | |
322 | hw, cx18_i2c_hw_name(hw), cmd); | |
323 | return addr; | |
324 | } | |
325 | return cx18_call_i2c_client(cx, addr, cmd, arg); | |
326 | } | |
327 | ||
328 | /* Calls i2c device based on I2C driver ID. */ | |
329 | int cx18_i2c_id(struct cx18 *cx, u32 id, unsigned int cmd, void *arg) | |
330 | { | |
331 | int addr; | |
332 | ||
333 | addr = cx18_i2c_id_addr(cx, id); | |
334 | if (addr < 0) { | |
335 | if (cmd != VIDIOC_G_CHIP_IDENT) | |
336 | CX18_ERR("i2c ID 0x%08x (%s) not found for cmd 0x%x!\n", | |
337 | id, cx18_i2c_id_name(id), cmd); | |
338 | return addr; | |
339 | } | |
340 | return cx18_call_i2c_client(cx, addr, cmd, arg); | |
341 | } | |
342 | ||
343 | /* broadcast cmd for all I2C clients and for the gpio subsystem */ | |
344 | void cx18_call_i2c_clients(struct cx18 *cx, unsigned int cmd, void *arg) | |
345 | { | |
346 | if (cx->i2c_adap[0].algo == NULL || cx->i2c_adap[1].algo == NULL) { | |
347 | CX18_ERR("adapter is not set\n"); | |
348 | return; | |
349 | } | |
350 | cx18_av_cmd(cx, cmd, arg); | |
351 | i2c_clients_command(&cx->i2c_adap[0], cmd, arg); | |
352 | i2c_clients_command(&cx->i2c_adap[1], cmd, arg); | |
353 | } | |
354 | ||
355 | /* init + register i2c algo-bit adapter */ | |
356 | int init_cx18_i2c(struct cx18 *cx) | |
357 | { | |
358 | int i; | |
359 | CX18_DEBUG_I2C("i2c init\n"); | |
360 | ||
361 | for (i = 0; i < 2; i++) { | |
362 | memcpy(&cx->i2c_adap[i], &cx18_i2c_adap_template, | |
363 | sizeof(struct i2c_adapter)); | |
364 | memcpy(&cx->i2c_algo[i], &cx18_i2c_algo_template, | |
365 | sizeof(struct i2c_algo_bit_data)); | |
366 | cx->i2c_algo_cb_data[i].cx = cx; | |
367 | cx->i2c_algo_cb_data[i].bus_index = i; | |
368 | cx->i2c_algo[i].data = &cx->i2c_algo_cb_data[i]; | |
369 | cx->i2c_adap[i].algo_data = &cx->i2c_algo[i]; | |
370 | ||
371 | sprintf(cx->i2c_adap[i].name + strlen(cx->i2c_adap[i].name), | |
372 | " #%d-%d", cx->num, i); | |
373 | i2c_set_adapdata(&cx->i2c_adap[i], cx); | |
374 | ||
375 | memcpy(&cx->i2c_client[i], &cx18_i2c_client_template, | |
376 | sizeof(struct i2c_client)); | |
377 | sprintf(cx->i2c_client[i].name + | |
378 | strlen(cx->i2c_client[i].name), "%d", i); | |
379 | cx->i2c_client[i].adapter = &cx->i2c_adap[i]; | |
380 | cx->i2c_adap[i].dev.parent = &cx->dev->dev; | |
381 | } | |
382 | ||
383 | if (read_reg(CX18_REG_I2C_2_WR) != 0x0003c02f) { | |
384 | /* Reset/Unreset I2C hardware block */ | |
385 | write_reg(0x10000000, 0xc71004); /* Clock select 220MHz */ | |
386 | write_reg_sync(0x10001000, 0xc71024); /* Clock Enable */ | |
387 | } | |
388 | /* courtesy of Steven Toth <stoth@hauppauge.com> */ | |
389 | write_reg_sync(0x00c00000, 0xc7001c); | |
390 | mdelay(10); | |
391 | write_reg_sync(0x00c000c0, 0xc7001c); | |
392 | mdelay(10); | |
393 | write_reg_sync(0x00c00000, 0xc7001c); | |
394 | ||
395 | write_reg_sync(0x00c00000, 0xc730c8); /* Set to edge-triggered intrs. */ | |
396 | write_reg_sync(0x00c00000, 0xc730c4); /* Clear any stale intrs */ | |
397 | ||
398 | /* Hw I2C1 Clock Freq ~100kHz */ | |
399 | write_reg_sync(0x00021c0f & ~4, CX18_REG_I2C_1_WR); | |
400 | cx18_setscl(&cx->i2c_algo_cb_data[0], 1); | |
401 | cx18_setsda(&cx->i2c_algo_cb_data[0], 1); | |
402 | ||
403 | /* Hw I2C2 Clock Freq ~100kHz */ | |
404 | write_reg_sync(0x00021c0f & ~4, CX18_REG_I2C_2_WR); | |
405 | cx18_setscl(&cx->i2c_algo_cb_data[1], 1); | |
406 | cx18_setsda(&cx->i2c_algo_cb_data[1], 1); | |
407 | ||
1f09e8a2 AW |
408 | cx18_reset_i2c_slaves_gpio(cx); |
409 | ||
1c1e45d1 HV |
410 | return i2c_bit_add_bus(&cx->i2c_adap[0]) || |
411 | i2c_bit_add_bus(&cx->i2c_adap[1]); | |
412 | } | |
413 | ||
414 | void exit_cx18_i2c(struct cx18 *cx) | |
415 | { | |
416 | int i; | |
417 | CX18_DEBUG_I2C("i2c exit\n"); | |
418 | write_reg(read_reg(CX18_REG_I2C_1_WR) | 4, CX18_REG_I2C_1_WR); | |
419 | write_reg(read_reg(CX18_REG_I2C_2_WR) | 4, CX18_REG_I2C_2_WR); | |
420 | ||
421 | for (i = 0; i < 2; i++) { | |
422 | i2c_del_adapter(&cx->i2c_adap[i]); | |
423 | } | |
424 | } | |
425 | ||
426 | /* | |
427 | Hauppauge HVR1600 should have: | |
428 | 32 cx24227 | |
429 | 98 unknown | |
430 | a0 eeprom | |
431 | c2 tuner | |
432 | e? zilog ir | |
433 | */ |